python - 为什么我的 pygame 圈子不断消失并重新产生？

Question

当我运行这个程序时，我希望游戏在随机位置生成一个较大的可移动点和数百个较小的不可移动点。然而，当我运行该程序时，较小的点不断消失和重生。我认为这与 pygame.display.update() 函数有关，但我不完全确定。如何解决这个问题？

from pygame import *
import random as rd

p_1_x = 200
p_1_y = 200
p_1_change_x = 0

init()
screen = display.set_mode((800, 600))


def p_1(x, y):
    player_1 = draw.circle(screen, (0, 0, 0), (x, y), 15)


def drawwing():
    for i in range(0, 250):
        x = rd.randint(100, 700)
        y = rd.randint(100, 500)
        dot = draw.circle(screen, (55, 255, 155), (x, y), 5)


while True:
    for events in event.get():
        if events.type == QUIT:
            quit()
        if events.type == KEYDOWN:
            if events.key == K_RIGHT:
                p_1_change_x = 1
            if events.key == K_LEFT:
                p_1_change_x = -1

        if events.type == KEYUP:
            if events.key == K_RIGHT or K_LEFT:
                p_1_change_x = 0
                p_1_change_y = 0

    screen.fill((255, 255, 255))
    p_1_x += p_1_change_x

    p_1(p_1_x, p_1_y)
    display.update()
    drawwing()
    display.update()

Answer 1

如果你想要固定点，请使用类似这样的东西:

dots = list((rd.randint(100,700),rd.randint(100,500)) for i in range(0,250))

def drawwing():
    for x,y in dots:
        draw.circle(screen, (55, 255, 155), (x, y), 5)